A co-founder of Greenpeace told lawmakers there is no evidence man is contributing to climate change, and said he left the group when it became more interested in politics than the environment.

Patrick Moore, a Canadian ecologist and business consultant who was a member of Greenpeace from 1971-86, told members of the Senate Environment and Public Works Committee environmental groups like the one he helped establish use faulty computer models and scare tactics in promoting claims man-made gases are heating up the planet.

“There is no scientific proof that human emissions of carbon dioxide (CO2) are the dominant cause of the minor warming of the Earth’s atmosphere over the past 100 years,” he said.

Even if the planet is warming up, Moore claimed it would not be calamitous for men, which he described as a “subtropical species.”

Skeptics of manmade climate change say there is no evidence the Earth is warming. A UN report on the scientific data behind global warming released in September indicated that global surface temperatures have not increased for the past 15 years, but scientists who believe climate change due to man is occurring say it has merely paused because of several factors and will soon resume.

The 2,200-page new Technical Report attributes that to a combination of several factors, including natural variability, reduced heating from the sun and the ocean acting like a “heat sink” to suck up extra warmth in the atmosphere.

Moore said he left Greenpeace in the 1980s because he believed it became more interested in politics than science.

“After 15 years in the top committee I had to leave as Greenpeace took a sharp turn to the political left, and began to adopt policies that I could not accept from my scientific perspective,” he said. “Climate change was not an issue when I abandoned Greenpeace, but it certainly is now.”